GPS中使用的一个SP3文件，保存了一周的卫星星历数据，在IGS官网上下载得到的
GPS used in an SP3 file, save a week of satellite ephemeris data, downloaded in the IGS official received (2008-07-07, Others, 64KB, 下载55次)
网络管理概念与技术，卫星专线数据网网管子系统的设计与实现
network management concepts and technology, satellite data green Network Management System Design and Implementation (2007-01-23, Others, 254KB, 下载1次)